Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/14—Stator cores with salient poles
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/12—Stationary parts of the magnetic circuit
  • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
  • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
  • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
  • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
  • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
  • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
  • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

Definitions

• Electric machines such as alternators typically utilize stators that have a plurality of slots therein within which conductive windings are positioned. Current flowing through the windings during operation of the machine generates magnetic fields that facilitate the machine's conversion of mechanical energy into electrical energy or vice versa. The operation of an electric machine often increases the temperature of the stator. Temperature is a cause of operational concern for electrical machines as it reduces performance during operation and over a longer term reduces machine life. In view hereof, assemblies and methods that tend to reduce operating temperatures of electric machines are well received by the art.
• an electrical device in an exemplary embodiment includes a plurality of stacked laminates that form a tubular stator portion, a cooling passage partially defined by orifices formed in the plurality of stacked laminates, a housing including a cavity further defining the cooling passage, the cooling passage defining a fluid flow path parallel to a rotational axis of the stator portion, a sump portion communicative with the cooling passage, the sump portion including a cavity defined by the stator portion and the housing member.
• an electrical device in another exemplary embodiment includes a plurality of stacked laminates that form a tubular stator portion, a cooling passage partially defined by orifices formed in the plurality of stacked laminates, a housing including a cavity further defining the cooling passage, the cooling passage defining a fluid flow path that is aligned radially relative to a rotational axis of the stator portion, a sump portion communicative with the cooling passage, the sump portion including a cavity defined by the stator portion and the housing member.
• FIG. 1 depicts a partial perspective view of a stator assembly disclosed herein
• FIG. 2 depicts a partial perspective view of an alternate embodiment of a stator assembly disclosed herein;
• FIG. 3 depicts a partial perspective view of another alternate embodiment of a stator assembly disclosed herein;
• FIG. 4 depicts a partial perspective view of yet another alternate embodiment of a stator assembly disclosed herein;
• FIG. 5 depicts a perspective view of an exemplary embodiment of an electrical device assembly disclosed herein;
• FIG. 6 illustrates a front view of the electrical device assembly of FIG. 5.
• FIG. 7 illustrates a side partially cut-away view of the electrical device assembly of FIG. 5.
• FIG. 1 illustrates a portion of an exemplary embodiment of a stator assembly 10.
• the assembly 10 includes a stator 12 having a tubular body with a plurality of slots 14.
• the stator 12 is constructed from a plurality of stacked and attached laminations 16.
• the illustrated assembly includes a plurality of cooling passages 18.
• the illustrated cooling passages 18 are shown with examples of a variety of shapes and profiles including, for example, circular shaped, star shaped, oval shaped, and crescent shaped. In operation, a cooling fluid flows through the cooling passages 18 and cools that stator 12.
• the laminations 16 are cut or stamped into the stator shape from a metallic sheet material.
• the stamping and cutting of the laminations into the stator shape includes the stamping or cutting of the cooling passages 18 in the laminations by forming orifices in the laminations 16.
• the stator shape and the cooling passages 18 may be stamped or cut in a single step, or in multiple steps.
• the laminations 16 are stacked in a desired order, the orifices are aligned to form cooling passages 18, and the laminations 16 are attached together to form the stator 12 having the cooling passages 18.
• One exemplary method for attaching the laminations 16 is to apply an adhesive to the metallic sheet material prior to the fabrication of the laminations 16. Once cut and stacked, heat and pressure may be applied to the laminations 16 to activate the adhesive and bond the laminations 16 together.
• FIG. 2 illustrates an alternate exemplary embodiment of a stator assembly 20.
• the stator assembly 20 includes a stator 22. Having cooling passages 18.
• the cooling passages 18 include portions that are orientated parallel to the rotational axis 21.
• the cooling passages 18 include curved portions 24 that connect the parallel portions. Cooling fluid may flow parallel and substantially perpendicular to the rotational axis 21 along a fluid flow path indicated by the arrows 25 and defined by the cooling passages 18.
• the curved portions 24 of the cooling passages 18 and the cooling passages 18 of FIG. 2 may be formed in a similar manner as the cooling passages 18 of FIG. 1 above by, for example, stamping or cutting the laminations 16 to form the curved portions 24.
• FIG. 3 illustrates an alternate exemplary embodiment of a stator assembly 30.
• the stator assembly 30 is similar to the stator assembly 20 (of FIG. 2) described above, however the curved portions 34 of the cooling passages 18 are formed in a housing portion 35 that is fastened to the stator 32.
• FIG. 4 illustrates another alternate exemplary embodiment of a stator assembly 40.
• the stator assembly 40 includes laminations 16 and is fabricated in a similar manner as described above.
• the stator assembly 40 includes cooling passages 41 that are orientated substantially radially relative to the rotational axis 42.
• a radial line relative to the rotational axis 42 is illustrated by the line 47.
• the flow of fluid is illustrated by the arrows 43.
• the illustrated embodiment includes ports 44 that are disposed on the arcuate outer radial surface 49 of the stator assembly 40.
• the cooling passages 45 are similar to the cooling passages 41 and include ports 46 that are disposed on the planar surface 48 of the stator assembly 40.
• FIG. 5 illustrates a perspective view of an exemplary embodiment of an electrical device assembly (device) 50 that includes a stator 12.
• the electrical device assembly 50 may be operated as, for example, a motor, alternator, or generator device.
• the stator 12 is shown for illustrative purposes, however any of the stator assemblies described above may be similarly disposed in the device 50.
• the motor assembly 50 includes housing portions 35 that may be fastened to the stator 12.
• FIG. 6 illustrates a front view of the motor assembly 50 with a housing portion 35 removed.
• the device 50 includes a sump portion 60 that includes cavities 61 defined by portions of the stator 12 and the housing portions 35.
• the sump portion 60 is arranged as an extension from the stator portion 40.
• the sump portion 60 is formed in the laminations 16 using a similar process as described above to form the cooling passages 45 (of FIG. 4). The sum may be used to retain and cool cooling lubricant that flows through the cooling passages 45 of the stator assembly 40.
• the sump portion 60 is sized and arranged to hold a sufficient amount of cooling lubricant to cool the stator assembly 40.
• the amount of cooling lubricant may, for example, depend on the amount of heat that is desired to be removed from the stator assembly 40.
• a rotor assembly 62 is disposed in the device 50. The rotor assembly 62 is aligned coaxially with the stator 12 and is operative to rotate relative to the stator 12.
• FIG. 7 illustrates a side cross-sectional view of the device 50 that includes the cooling passages 18.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Cooling System (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=44971920

Family Applications (1)

Country Status (5)

Families Citing this family (11)

Family Cites Families (17)

• 2011
  • 2011-05-19 WO PCT/US2011/037103 patent/WO2011146690A2/en not_active Ceased
  • 2011-05-19 KR KR1020127033022A patent/KR20130118743A/ko not_active Withdrawn
  • 2011-05-19 CN CN2011800241055A patent/CN102893496A/zh active Pending
  • 2011-05-19 EP EP11784223.7A patent/EP2572435A4/de not_active Withdrawn
  • 2011-05-20 US US13/112,204 patent/US8872399B2/en not_active Expired - Fee Related

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